mtg cavalry charge commander deck March of the Machine Her faction has become the Machine Legion MTG March Of The Machine:

All that mana does no good if your well-known threat of a commander gets countered, so a Cavern of Souls is excellent protection

Each one teaches a core Magic concept, rewards a clear and forgiving strategy, and wont ask you to memorize a rulebook before your first turn

That's all well and good, but if you can hang on to that Metalworker you often end up with eight, ten or even more mana by showing your opponent most or all of your hand

Big deck energy: How to build a Commander deck Originally, Companion cards could be played right from the sideboard, but this was deemed too powerful pretty early on, and the rules were updated a couple of months after Ikoria came out